Recoil brake



Dec. 6, 1927.

J. W. WATSON 1652074 RECOIL B`RAKE Filed sept. 1. 192s' Patented Dec. 6, 1927.

FICE', Y

ifo'HN WARREN 'wATvsoNfoF IJLEILiinarnia',rialaivsimvaivra,`'AssIeNoiti Y 'Js/nisNiiv y' A'ssIGfNiafrnlv'J:s', v'rfoftzrogH'ia WARREN w'ATjsoN COMPANY,

nncorn BRAKE.

` Applicationmed'sptemberr1,192af-ser1ai'No.-660,5911,

f nature.

These objects and other advantageous ends holding substantially. apredeterniined shape'.

i Another (object. ;is.,to provide a ,friction- `member which presents vvto the; strapl or equivalent power transmitting element with which j'it is associated, a'relatively smooth surface in order to permita relatively free limited movementl without causing undueV friction. Y Y Y,

Afurther object of my invention is to rovide a motion'retarding deviceV or recoil rake which, by reason of its inclusion of a friction member having the above characteristics, shall be of simplified construction as compared withprior devices of a similar I attain as hereinafter set forth, reference being had to the accompanying drawings, in which,

Figs. 1 and 2 are vertical sections, thev first taken on the line 1 1, 2 and' the the latter on the line 2-2, Fig. 1.

In the above drawings, X and YV repre-k sent relatively movable elements whose Inotion relative to each other it -is desired'to check, regulate or control. Attached to the element X by a cap screw 1 and kept Yfrom turning with relation to said element by means of a projection 2, is a member 3 which supports two drums .4.kand `5 and aspring 6 by suitable means such as squared portions of the member 3 fittingl ycorrespondingly squared openings in the sides ofsaid drums.' The latter are thus held against rotation' relatively to the member 3 and are hence also held with relation to the element X. kRotatably mounted on and approximately con-k formin to the shape of the outer surface of the dr of some material of limited resilience such as wood, vulcanized libre, bakelite yor other natural or artificial material, which is capable of holdingV substantially a predetermined shape, Attached to this' friction member by means such as rivets 8 is a member 9 which serves to connect it to the spring Vformed in said member.

ums 4 and 5 is a friction member 7` 6. l Also attachedhtof 7 Aby said rivets" 8 is aflexible" power Vtransmitting member such; las elementYi-VA p y .Y y A f Y '.12Fa'stened 'around the. spring. 6` in fany suitv able-manner, as by vhaving itsl ends `hooked one into the otheigisj aretaining band 11 designedto facilitate theV assemblage Vof the` spring'within the drums 4 and 5 and Whichalsol serves to Ymaintain said spring. within predetermined'limits outof contact with the avy strap 10 connected to? the innersurface of said drums regardless of4 the'extent 1to= which said spring maybe wound up or unwound. The innerl Vend ofthe 'spring is held to the member'S by` suitable means, as by hooking it into a slot suitably yThe outer end of the spring `6 is also provided with hooks 12-12extending beyondthe band 11 and lserving Yfor the attachment' of the member 9.y

Members14 and 15 are'heldrto the members 4V and 5 by'spot welding or by other suitable means, and with a. cover member 16, act to housetheentire mechanism andra-lso to maintain a predetermined spacing between the drum members 4 and 5. A nut 17 and lock washer 18 serves to maintain the parts in their relative positions.

Inaccordance with my invention, the

' friction member 7 presents to the strap 10 a` vrelatively smooth surface so as to minimize friction between these two elements, andby makingsaid friction member of such mate-` I rial'as will possess suiicient inherent stii- Y ness to cause it to maintain a definite and substantially constant shape, I avoidL the necessity of providing'this member with a supporting backing. The device is thus materially simplified. 1 1 I v Under conditions of use and with the device mounted in themanner illustrated, if

the elements X and Y are caused to appreach each other, the spring 6 will immediately act to rotate the friction member 7 around the drum members 4 and 5 and thus said member 7. As said elements X and Y are caused to separate, ,fr1ct1onal resistance the spring which thus insures its intimate engagement with saidV drums. The power keep taut the power transmitting member v10'whichthereupon is wrapped lor laid upon of the spring 6 my be verionsl ldjested by removing the mit 17, out "the member 3 from the casing 14-1615 a suirient distance to disenffage the `squared pemons of Sad member ,rom the' squared openings in the drm member 4 nn'd 5, turningA said member 3 either bnckwarrdI or forward one or more revolutions, an then reinsertingr said member into the holes of` 10 the drum members 4 and 5.

While I have `illustrated my `invention as" applied to e motion' cohtrollmgmecbamsm:

employing :i` imi oli-drum immbersend having: :l speciic combination of friction im and power rhnsmitting niemberxs,` it will be iinrlerstocxl that saisit intention is independL:

enf` df the particular zrrrangiiientlnd con struction of the parte of thed'evice,` siilceit his` to dnprimarily with theneeorf a: fric-4 20 tion' member capable `oi" holding n deiinile` `I claim: 25 l 1. The eombindtion in i mariee ewfding device of a supporting drum; a friction member operative onand preformed to hold itse1'f, y unaided throgh'ot its entirety, ih t approximate confini'tym with said drum; 30 end l uV power transmitting member overlying and connected to the friction member, the lutter `presenting a relatively smooth surface to said power transmitting member.

2. In* a device forlretnrdinig'g.` thefreliitive" 35 niovement of two elemente` the combination of l drum member for connection to` (me: effl seid elements; a` friction niiernbern curved myl conform te said drum member and' mde' of ar material capable unaided of maintaining 40 subist'afntialiy said curvature; withl er` i transmitting member connected to the fric#y tion member and adapted for connection to theeecond' element, the friction member prei' senting a relatively smooth surfacey tof the 5 power transmitting member.

`JOHN WARREN WAfrso-NQ r 

